Electron moves in the orbit as________________?
(A) Simple vibratory motion
(B) Standing wave motion
(C) Vibratory motion like up and down
(D) S.H.M likes the sound
Compton effect proves the________________?
(A) Photon theory of light
(B) Dual nature of light
(C) Wave nature of light
(D) Uncertain nature of light
The energy radiated is directly proportional to the fourth power of Kelvins temperature is________________?
(A) Karl-Weins law
(B) Rayleigh-Jeans law
(C) Stephens law
(D) Plancks
For confinement of electron in a box of radius 10-14m the electron, speed should be_____________?
(A) 107m/sec
(B) Should be greater than the speed of light.
(C) Be zero
(D) Not be wave-like
The uncertainty in momentum & position is due to its_____________?
(A) Property of matter and radiation
(B) Two-dimensional motion
(C) Emission of the certain wavelength
(D) Very high velocity
A three-dimensional image is obtained by________________?
(A) Electron microscope
(B) Scanning electron microscope
(C) Magnetic imaging
(D) None of the above
Least distance of distinct vision_____________?
(A) increases with increase in age
(B) decreases with increase in age
(C) neither increases nor decreases
(D) becomes infinite after 60 years
Two convex lenses of equal focal length f are placed in contact the resultant focal length of the combination is______________?
(A) zero
(B) focus
(C) 2 f
(D) f/2
For normal adjustment, length of astronomical telescope is______________?
(A) fo + fe
(B) fo – fe
(C) fo / fe
(D) fe / fo
Final image produced by a compound microscope is_____________?
(A) real and inverted
(B) real and erect
(C) virtual and erect
(D) virtual and inverted